hey guys this is my 1st android app(learning), so i want to call a number given in the textbox but i'm getting error as "The application 'xyz'(process com.adroid) has stoped unexpectedly".. following the code i have done so far... where m doing wrong ??

EditText txtPhn;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Button callButton = (Button)findViewById(R.id.btnCall);
    txtPhn = (EditText)findViewById(R.id.txtPhnNumber);
    callButton.setOnClickListener(new OnClickListener() {

        public void onClick(View v) {
            try {
                    Intent callIntent = new Intent(Intent.ACTION_CALL);
                    callIntent.setData(Uri.parse("tel:"+txtPhn.getText().toString()));
                    startActivity(callIntent);
                } catch (ActivityNotFoundException activityException) {
                    Log.e("Calling a Phone Number", "Call failed", activityException);
                }
        }
    });
}

EDITED LogCat

03-09 11:23:25.874: ERROR/AndroidRuntime(370): FATAL EXCEPTION: main
03-09 11:23:25.874: ERROR/AndroidRuntime(370): java.lang.SecurityException: Permission Denial: starting Intent { act=android.intent.action.CALL dat=tel:xxx-xxx-xxxx flg=0x10000000 cmp=com.android.phone/.OutgoingCallBroadcaster } from ProcessRecord{40738d70 370:org.krish.android/10034} (pid=370, uid=10034) requires android.permission.CALL_PHONE
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at android.os.Parcel.readException(Parcel.java:1322)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at android.os.Parcel.readException(Parcel.java:1276)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:1351)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1374)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at android.app.Activity.startActivityForResult(Activity.java:2827)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at android.app.Activity.startActivity(Activity.java:2933)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at org.krish.android.caller$1.onClick(caller.java:29)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at android.view.View.performClick(View.java:2485)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at android.view.View$PerformClick.run(View.java:9080)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at android.os.Handler.handleCallback(Handler.java:587)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at android.os.Handler.dispatchMessage(Handler.java:92)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at android.os.Looper.loop(Looper.java:123)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at android.app.ActivityThread.main(ActivityThread.java:3683)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at java.lang.reflect.Method.invokeNative(Native Method)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at    java.lang.reflect.Method.invoke(Method.java:507)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
03-09 11:23:25.874: ERROR/AndroidRuntime(370):     at dalvik.system.NativeStart.main(Native Method)